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Requirement for bandgap bandwidth

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niklas.zhu

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From my point of view, there is no special requirement on bandwidth of bandgap,

and it only used when calculating integrated noise.

Am I understanding right?

thanks,
 

Re: bandgap bandwidth

Could anyone help me?
 

bandgap bandwidth

i think low bandwidth also have low psrr bandwidth.
 

bandgap bandwidth

the bandgap bandwidth means the effect the filter the noise which from the vdd and the substract.
so if there are low bandwidth ,there should be a good psrr .and a high bandwidth should get the poor psrr
 

Re: bandgap bandwidth

eagleliujun said:
the bandgap bandwidth means the effect the filter the noise which from the vdd and the substract.
so if there are low bandwidth ,there should be a good psrr .and a high bandwidth should get the poor psrr
Click to expand...

Why not do a simulation for psrr and cross check?

Added after 52 minutes:

A lower bandwidth will lead to a poor psrr on higher frequencies... as the gain rolls off at low frequencies...

also a low (loop)bandwidth leads to slower transient responses... higher startup and settling times...

hope this helps.
 

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